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In-battery resistance

Cherry Zhou
Mastermind 22235 points

Hi team,

The customer would like to know how to accurately measure the internal resistance of the battery. Could yo help resolve this case? Thanks.

Best Regards,

Cherry

  • 0
    TI__Genius 11770 points

    Hello Cherry,

    Our impedance track gauges do measure that automatically, and with a high level of precision. The best way to measure the internal resistance is similar to how our gauges do it. Measure the open-circuit, rested voltage on the battery, apply a constant current load to the battery, then measure the voltage under load. Then, you can use the equation:

    Vload = OCV - I*R

    We have measured Vload and OCV, and know current. Because of this, we can calculate the internal resistance of the battery using this method. 

    Alex M.